Add support for FileWrapper in HwpFile.init (#43)

* Change Init

* swiftlint

* Add preprocessor and test

* swiftlint

Package.swift

@@ -8,7 +8,7 @@ let package = Package(
         .library(name: "CoreHwp", targets: ["CoreHwp"])
     ],
     dependencies: [
-        .package(url: "https://github.com/CoreOffice/OLEKit.git", .exact("0.2.0")),
+        .package(url: "https://github.com/CoreOffice/OLEKit.git", .exact("0.3.0")),
         .package(url: "https://github.com/tsolomko/SWCompression.git", .exact("4.5.7")),
 
         .package(url: "https://github.com/Quick/Nimble", .exact("9.0.0"))

Sources/CoreHwp/HwpError.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 public enum HwpError: Error {
-    case invalidFilePath(path: String)
+    case invalidFile(path: String)
     case streamDoesNotExist(name: HwpStreamName)
     case streamDecompressFailed(name: HwpStreamName)
     case invalidDataForString(data: Data, name: String)
@@ -16,7 +16,7 @@ public enum HwpError: Error {
 extension HwpError: CustomStringConvertible {
     public var description: String {
         switch self {
-        case let .invalidFilePath(path):
+        case let .invalidFile(path):
             return "Invalid File Path '\(path)'"
         case let .streamDoesNotExist(name):
             return "Stream '\(name)' does not exist"

Sources/CoreHwp/HwpFile.swift

@@ -14,13 +14,27 @@ public struct HwpFile: HwpPrimitive {
         previewText = HwpPreviewText()
     }
 
-    public init(filePath: String) throws {
-        let ole: OLEFile
+    public init(fromPath filePath: String) throws {
         do {
-            ole = try OLEFile(filePath)
+            let ole = try OLEFile(filePath)
+            try self.init(fromOLE: ole)
         } catch {
-            throw HwpError.invalidFilePath(path: filePath)
+            throw HwpError.invalidFile(path: filePath)
         }
+    }
+
+    #if os(iOS) || os(watchOS) || os(tvOS) || os(macOS)
+    public init(fromWrapper fileWrapper: FileWrapper) throws {
+        do {
+            let ole = try OLEFile(fileWrapper)
+            try self.init(fromOLE: ole)
+        } catch {
+            throw HwpError.invalidFile(path: fileWrapper.filename ?? "")
+        }
+    }
+    #endif
+
+    private init(fromOLE ole: OLEFile) throws {
         let streams = Dictionary(uniqueKeysWithValues: ole.root.children.map { ($0.name, $0 ) })
         let reader = StreamReader(ole, streams)
 
@@ -41,5 +55,4 @@ public struct HwpFile: HwpPrimitive {
         let previewTextReader = try ole.stream(previewTextStream)
         previewText = try HwpPreviewText.load(previewTextReader.readDataToEnd())
     }
-
 }

Tests/CoreHwpTests/HwpErrorTests.swift

@@ -0,0 +1,9 @@
+import CoreHwp
+import XCTest
+import Nimble
+
+class HwpErrorTests: XCTestCase {
+    func test() throws {
+        expect {try openHwp(#file, "")}.to(throwError(HwpError.invalidFile(path: "")))
+    }
+}

Tests/CoreHwpTests/Utils.swift

@@ -5,14 +5,14 @@ func openHwp(_ location: String, _ name: String) throws -> HwpFile {
     let url = URL(fileURLWithPath: location)
         .deletingLastPathComponent()
         .appendingPathComponent(name + ".hwp")
-    return try HwpFile(filePath: url.path)
+    return try HwpFile(fromPath: url.path)
 }
 
 func createHwp(_ location: String, _ name: String) throws -> (HwpFile, HwpFile) {
     let url = URL(fileURLWithPath: location)
         .deletingLastPathComponent()
         .appendingPathComponent(name + ".hwp")
     let this = HwpFile()
-    let official =  try HwpFile(filePath: url.path)
+    let official =  try HwpFile(fromPath: url.path)
     return (this, official)
 }